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90 lines
4.8 KiB
90 lines
4.8 KiB
// Copyright (c) Six Labors.
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// Licensed under the Six Labors Split License.
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using System.IO;
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using BenchmarkDotNet.Attributes;
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using SixLabors.ImageSharp.Formats.Jpeg;
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using SixLabors.ImageSharp.Formats.Jpeg.Components.Decoder;
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using SixLabors.ImageSharp.IO;
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using SixLabors.ImageSharp.Tests;
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using SDSize = System.Drawing.Size;
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namespace SixLabors.ImageSharp.Benchmarks.Codecs.Jpeg
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{
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[Config(typeof(Config.ShortMultiFramework))]
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public class DecodeJpegParseStreamOnly
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{
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[Params(TestImages.Jpeg.BenchmarkSuite.Lake_Small444YCbCr)]
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public string TestImage { get; set; }
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private string TestImageFullPath => Path.Combine(TestEnvironment.InputImagesDirectoryFullPath, this.TestImage);
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private byte[] jpegBytes;
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[GlobalSetup]
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public void Setup()
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=> this.jpegBytes = File.ReadAllBytes(this.TestImageFullPath);
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[Benchmark(Baseline = true, Description = "System.Drawing FULL")]
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public SDSize JpegSystemDrawing()
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{
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using var memoryStream = new MemoryStream(this.jpegBytes);
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using var image = System.Drawing.Image.FromStream(memoryStream);
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return image.Size;
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}
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[Benchmark(Description = "JpegDecoderCore.ParseStream")]
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public void ParseStream()
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{
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using var memoryStream = new MemoryStream(this.jpegBytes);
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using var bufferedStream = new BufferedReadStream(Configuration.Default, memoryStream);
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var options = new JpegDecoderOptions();
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options.GeneralOptions.SkipMetadata = true;
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using var decoder = new JpegDecoderCore(options);
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var spectralConverter = new NoopSpectralConverter();
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decoder.ParseStream(bufferedStream, spectralConverter, cancellationToken: default);
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}
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// We want to test only stream parsing and scan decoding, we don't need to convert spectral data to actual pixels
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// Nor we need to allocate final pixel buffer
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// Note: this still introduces virtual method call overhead for baseline interleaved images
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// There's no way to eliminate it as spectral conversion is built into the scan decoding loop for memory footprint reduction
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private class NoopSpectralConverter : SpectralConverter
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{
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public override void ConvertStrideBaseline()
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{
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}
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public override void InjectFrameData(JpegFrame frame, IRawJpegData jpegData)
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{
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}
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public override void PrepareForDecoding()
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{
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}
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}
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}
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}
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/*
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BenchmarkDotNet=v0.13.0, OS=Windows 10.0.19042.1083 (20H2/October2020Update)
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Intel Core i7-6700K CPU 4.00GHz (Skylake), 1 CPU, 8 logical and 4 physical cores
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.NET SDK=6.0.100-preview.3.21202.5
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[Host] : .NET Core 3.1.13 (CoreCLR 4.700.21.11102, CoreFX 4.700.21.11602), X64 RyuJIT
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Job-VAJCIU : .NET Core 2.1.26 (CoreCLR 4.6.29812.02, CoreFX 4.6.29812.01), X64 RyuJIT
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Job-INPXCR : .NET Core 3.1.13 (CoreCLR 4.700.21.11102, CoreFX 4.700.21.11602), X64 RyuJIT
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Job-JRCLOJ : .NET Framework 4.8 (4.8.4390.0), X64 RyuJIT
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IterationCount=3 LaunchCount=1 WarmupCount=3
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| Method | Job | Runtime | TestImage | Mean | Error | StdDev | Ratio | Gen 0 | Gen 1 | Gen 2 | Allocated |
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|---------------------------- |----------- |--------------------- |---------------------- |---------:|----------:|----------:|------:|--------:|------:|------:|----------:|
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| 'System.Drawing FULL' | Job-VAJCIU | .NET Core 2.1 | Jpg/baseline/Lake.jpg | 5.196 ms | 0.7520 ms | 0.0412 ms | 1.00 | 46.8750 | - | - | 210,768 B |
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| JpegDecoderCore.ParseStream | Job-VAJCIU | .NET Core 2.1 | Jpg/baseline/Lake.jpg | 3.467 ms | 0.0784 ms | 0.0043 ms | 0.67 | - | - | - | 12,416 B |
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| | | | | | | | | | | | |
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| 'System.Drawing FULL' | Job-INPXCR | .NET Core 3.1 | Jpg/baseline/Lake.jpg | 5.201 ms | 0.4105 ms | 0.0225 ms | 1.00 | - | - | - | 183 B |
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| JpegDecoderCore.ParseStream | Job-INPXCR | .NET Core 3.1 | Jpg/baseline/Lake.jpg | 3.349 ms | 0.0468 ms | 0.0026 ms | 0.64 | - | - | - | 12,408 B |
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| | | | | | | | | | | | |
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| 'System.Drawing FULL' | Job-JRCLOJ | .NET Framework 4.7.2 | Jpg/baseline/Lake.jpg | 5.164 ms | 0.6524 ms | 0.0358 ms | 1.00 | 46.8750 | - | - | 211,571 B |
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| JpegDecoderCore.ParseStream | Job-JRCLOJ | .NET Framework 4.7.2 | Jpg/baseline/Lake.jpg | 4.548 ms | 0.3357 ms | 0.0184 ms | 0.88 | - | - | - | 12,480 B |
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*/
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